Trolley pole



E. D. MOORE Dec. 30, 1930.

TROLLEY POLE- Filed March 6, 1950 Invenlar 776 415 D. M00

Patented 30, 1930 j UNITE; STATEEtE ammonia.

EDGAR n. Moons, or MANSFIELD, onro, nssrenort, T0 rrrnonro BRASS COMPANY, or

MANSFIELD, orrro; A conronn'rron or NEW'JERSEY TROLLEY Porn 7 7 Application filed March 6,

My invention relates to a trolley pole and its object is to improve the electrical conductivity of the present type'of pole and its contact with supporting devices.

The present trolley poles used for supporting a current collector in contact with trolley wire are made of steel and are as thin cross section as possible to secure lightness, therefore they are of relatively high resistance to a flow of current.

The current demand on cars is considerably on the increase and no provision has been made to improve the electrical conductivity of the poles or the contact with the pole sup- ]porting device commonly known as a trolley ase.

My invention resides in the new and novel construction, combination and relation of the various parts hereinafter described and shown in the accompanying drawing Fig. l is an interrupted view in elevation of my invention and in partial section.

Fig. 2 is a section on the line 22 of Fig. 1.

Fig. 3 is a section on the line 33 of Fig. 1.

Fig. 4: is a view of the large or lower end of p the pole.

some conditions.

Fig. 5 is aviewjof the upper or small end of the pole.

Fig. 6 is a modification of my invention later described.

In the preferred embodiment of my invention I use a pole member 1 of required length and diameter; of tubular cross section and usually tapered. The'pole is 1 preferably of seamless draw-n or rolled, construction although it may be butt or lap welded under In. order to increase electric conductivity of the pole I positionwithin the pole a conductor 2- preferably of copper which may be of solid or flexible wire and bare or insulated although I prefer the former. The ends 3 and {l of the member 2 are brought to the ends of the pole 1 and secured thereto by means of The weldsthe welds 5 and 6' respectively. are made preferably with copper or copper base alloy and may be accomplished by means of the oXy-acetylene flame or the electric arc or by brazing. I V

It is not newto connect the current collecthat the poleis provided with a linin 12 0f 1330.. Serial No. 433,676.

tor or itsilnmediate support directly to the trolley base by meansof a conductor, but this method is of distinct disadvantage because it is frequently necessary to change a trolley pole while the car is in service and such 55 changes must be made as rapidly'as possible and if. it is necessary for the car. operators to be obliged to not only remove the pole from its trolley base but also disconnect and connect thecablefromthe trolley base considerable 6Qv time is involved in excess of thatwhich would be required in changing a pole of my invention. To further increase the vefiiciency of the pole I apply to the outersurface of the lower e end a coating of copper or other high conduc-, tivity material which is engaged by the clamps of the trolley base. This coating. may be appliedby electroplating or by metal spray oriby dipping theend ,ofthe pole in niolten 75); metal. This coating is represented by the numeral 7 in the drawings and'is brought across theend face of thepole as shown at 8 and has electrical contactwith the conductor 2 which may be brought, about by bringing the weld 75 6 across the end of the pole 1 as shown at 9.

It is quite evident that if desired a coating 10 maybe applied to the outer surface at the. small endof'thepole the sameas described atv the large orlower end and connected at 11 I to the conductor 2 and it is also quite evident that the coating may be applied to the inner surface of the poleadj acentthe ends thereof; In. Fig. 6 .I have shown a modification in copper or other. non-ferrous metal in union with the inner surfaceof the pole. This may be accomplished byforming the pole of a rod of'bi-lmet'al or of-coating the inside of the pole of's'teel by means of molten metal in contact therewith. V,

' I-Iaving disclosed my invention and knowing, that. others may -create modifications the-reoffI wish to be limited only by my claims. v

Iclai nzv V Ajtrolley' pole comprising' a tubular memberorrerrou metal, a conductor of copper'within the member and extending from end to endof the member and having its ends welded to the inner surface of the member at its ends, a coating of copper applied to the outer surface of the ends of the member and extending back from the ends and extending across the end faces of the member and con-.

nected to the conductor. a

2. A trolley pole comprising a tubular member of ferrous metal, means extending longitudinally through the member from end to end and having its ends welded'to the inner surface of the member by means of attaching metal, the attaching metal extending across the face of the member at one end.

3. A trolley pole comprising a tubular r member of ferrous metal, means extending longitudinally through the member from end to end and having its ends welded to the innersurface of the member by means "of attaching metal, the attaching metal extending across the facexof the member at one end, a coating of non f'errous metal on the outer surface of the memberat one end and'electrically connected tothe'conductor by said attaching metal. r

,4." A trolley pole comprising a tubular member of ferrous metal with a conducting member therein of copper extending from end to end of the tubular member and the two secured togetherat their ends and a layer of non-"ferrous metal mechanically secured to the pole adjacent an endand having direct electrical connection with the pole and with the conducting member.

A trolley pole" comprising a tubular member of ferrous metal witha conducting membertherein of copper e'xtending from end to end of the tubularmember and the two secured together at their ends, a non-ferrous conducting member secured to the outer surface of the tubular member at its end andha'ying'an electrical connection with the copper conducting member other than that poles comprising the steps of forming a seamthro-ughthe ferrous member. 6.] The method of manufacturing trolley poles-comprising the steps of forming aseamless tapered tube of ferrous -material, positioning a conducting member of non-ferrous material within thetubing and then welding the ends of the non-ferrous member to the surface ofthe tubing adjacent its ends.

7. The method of manufacturing trolley less'tap'ered tube of ferrous material, depositing a coating of non-ferrous metal upon the outer surface of the pole adjacent its end,positioning aconducting- 'member of copper within the'tubing and then uniting the ends of the non-ferrous member to'the surface of 'the tubing adjacent its ends and to the coating- In testimony whereof I aliix my signature. 7

i MOORE. 

